diff --git a/tests/test_agent_memory.py b/tests/test_agent_memory.py
index 35669d36..bb8e4327 100644
--- a/tests/test_agent_memory.py
+++ b/tests/test_agent_memory.py
@@ -20,6 +20,7 @@ from agent.memory import (
     SessionTranscript,
     create_agent_memory,
 )
+from nexus.mempalace.conversation_artifacts import ConversationArtifact
 from agent.memory_hooks import MemoryHooks
 
 
@@ -184,6 +185,24 @@ class TestAgentMemory:
         doc_id = mem.write_diary()
         assert doc_id is None  # MemPalace unavailable
 
+    def test_remember_alexander_request_response_uses_sovereign_room(self):
+        mem = AgentMemory(agent_name="allegro")
+        mem._available = True
+        with patch("nexus.mempalace.searcher.add_memory", return_value="doc-123") as add_memory:
+            doc_id = mem.remember_alexander_request_response(
+                request_text="Catalog my requests.",
+                response_text="I will preserve them as artifacts.",
+                requester="Alexander Whitestone",
+                source="telegram:timmy-time",
+            )
+
+        assert doc_id == "doc-123"
+        kwargs = add_memory.call_args.kwargs
+        assert kwargs["room"] == "sovereign"
+        assert kwargs["wing"] == mem.wing
+        assert kwargs["extra_metadata"]["artifact_type"] == "alexander_request_response"
+        assert kwargs["extra_metadata"]["speaker_tags"] == ["speaker:alexander", "speaker:allegro"]
+
 
 # ---------------------------------------------------------------------------
 # MemoryHooks tests
diff --git a/tests/test_conversation_artifacts.py b/tests/test_conversation_artifacts.py
new file mode 100644
index 00000000..dec55bb5
--- /dev/null
+++ b/tests/test_conversation_artifacts.py
@@ -0,0 +1,52 @@
+from nexus.mempalace.config import CORE_ROOMS
+from nexus.mempalace.conversation_artifacts import (
+    ConversationArtifact,
+    build_request_response_artifact,
+    extract_alexander_request_pairs,
+    normalize_speaker,
+)
+
+
+def test_sovereign_room_is_core_room() -> None:
+    assert "sovereign" in CORE_ROOMS
+
+
+def test_normalize_speaker_maps_alexander_variants() -> None:
+    assert normalize_speaker("Alexander Whitestone") == "alexander"
+    assert normalize_speaker("Rockachopa") == "alexander"
+    assert normalize_speaker("  ALEXANDER  ") == "alexander"
+    assert normalize_speaker("Bezalel") == "bezalel"
+
+
+def test_build_request_response_artifact_creates_sovereign_metadata() -> None:
+    artifact = build_request_response_artifact(
+        requester="Alexander Whitestone",
+        responder="Allegro",
+        request_text="Please organize my conversation artifacts.",
+        response_text="I will catalog them under a sovereign room.",
+        source="telegram:timmy-time",
+        timestamp="2026-04-16T01:30:00Z",
+    )
+
+    assert isinstance(artifact, ConversationArtifact)
+    assert artifact.room == "sovereign"
+    assert artifact.metadata["speaker_tags"] == ["speaker:alexander", "speaker:allegro"]
+    assert artifact.metadata["artifact_type"] == "alexander_request_response"
+    assert artifact.metadata["responder"] == "allegro"
+    assert "## Alexander Request" in artifact.text
+    assert "## Wizard Response" in artifact.text
+
+
+def test_extract_alexander_request_pairs_finds_following_wizard_response() -> None:
+    turns = [
+        {"speaker": "Alexander Whitestone", "text": "Catalog my requests as artifacts.", "timestamp": "2026-04-16T01:00:00Z"},
+        {"speaker": "Allegro", "text": "I'll build a sovereign room contract.", "timestamp": "2026-04-16T01:01:00Z"},
+        {"speaker": "Alexander", "text": "Make sure my words are easy to recall.", "timestamp": "2026-04-16T01:02:00Z"},
+        {"speaker": "Allegro", "text": "I will tag them with speaker metadata.", "timestamp": "2026-04-16T01:03:00Z"},
+    ]
+
+    artifacts = extract_alexander_request_pairs(turns, responder="Allegro", source="telegram")
+
+    assert len(artifacts) == 2
+    assert artifacts[0].metadata["request_timestamp"] == "2026-04-16T01:00:00Z"
+    assert artifacts[1].metadata["response_timestamp"] == "2026-04-16T01:03:00Z"